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<p>Ni supported on SiO<sub>2</sub> with various morphologies such as nanocubes, nanorods, nanospheres and dendritic mesoporous silica (DMS) are prepared and employed for zero emission hydrogen production (Turquoise hydrogen). The fresh calcined catalysts possessed NiO (200) planes predominantly while in the reduced samples Ni<sup>0</sup> (111) planes are majorly exposed irrespective of SiO<sub>2</sub> morphology. Among these the Ni-DMS demonstrated a higher rate of H<sub>2</sub> production while, the Ni/nanorods showed inferior activity. Formation of Ni silicate was found only in case of Ni/nanorods. Ionic Ni reduced below 600&#xa0;°C seems to exhibit better CH<sub>4</sub> cracking rate, as was depicted from H<sub>2</sub>-TPR results. Variation in graphitic carbon was found due to difference in SiO<sub>2</sub> morphology as well as the reducibility of nickel interacted with SiO<sub>2</sub>.</p>

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Effect of SiO2 Morphology on CH4 Pyrolysis Activity of Ni Catalyst in the Emission Free H2 Production

  • 期刊论文

  • 发表日期：

    2025年8月23日

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  • Kalpana Manda,
  • Sasikumar Boggala,
  • Anjaneyulu Chatla,
  • Venugopal Akula

摘要

Ni supported on SiO2 with various morphologies such as nanocubes, nanorods, nanospheres and dendritic mesoporous silica (DMS) are prepared and employed for zero emission hydrogen production (Turquoise hydrogen). The fresh calcined catalysts possessed NiO (200) planes predominantly while in the reduced samples Ni0 (111) planes are majorly exposed irrespective of SiO2 morphology. Among these the Ni-DMS demonstrated a higher rate of H2 production while, the Ni/nanorods showed inferior activity. Formation of Ni silicate was found only in case of Ni/nanorods. Ionic Ni reduced below 600 °C seems to exhibit better CH4 cracking rate, as was depicted from H2-TPR results. Variation in graphitic carbon was found due to difference in SiO2 morphology as well as the reducibility of nickel interacted with SiO2.